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Table 3 Between-subjects correlations of stable individual differences (BLUP)

From: Sleep, physical activity and BMI in six to ten-year-old children measured by accelerometry: a cross-sectional study

  BMI BMI sds Obese vs normal weight Overweight vs normal weight Mean activity Time spent sedentary Time spent in MVPA Sleep onset (time of day) Sleep end (time of day) Sleep efficiency TST
Total sleep time, TST (min) -.085 -.099 -.042 -.039 -.068 .051 -.052 -.596 .159 -.158 1
Sleep efficiency, SE (%) .024 -.029 .038 .019 -.233 .199 -.226 .139 .024 1  
Sleep end (time of day) -.064 -.060 -.051 -.043 -.085 .109 -.081 .692 1   
Sleep onset (time of day) .005 .018 -.009 -.014 -.025 .056 -.032 1    
Time spent in MVPA (min) -.124 -.102 -.109 -.108 .976 -.837 1     
Time spent sedentary (%) .052 .044 .052 .046 -.847 1      
Mean activity (cpm) -.115 -.096 -.100 -.107 1       
Owerweight vs normal weight .765 .710 .477 1        
Obese vs normal weight .644 .569 1         
BMIsds .914 1          
BMI 1           
  1. Abbreviations: BLUP best linear unbiased predictor, TST total sleep time; SE sleep efficiency, WASO wake after sleep onset, MVPA moderate-to-vigorous physical activity, cpm counts per minute, BMIsds Body Mass Index standard deviations score, BMI body mass index. Significant correlations (p < .01) are in bold text. n = 1,160 individuals and 7,164 observations of sleep data.